cantilever walls
DESCRIPTION
Presentation of cantilever retaining wallTRANSCRIPT
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Cantilever/Gravity Walls
Bar lists and estimates from standard design sheet
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Cantilever/Gravity WallsCantilever walls have footings forward/back of the wall (wall is essentially a cantilevered structureGravity walls have no footings *http://content.answers.com/main/content/img/McGrawHill/atchitecture/f0169-02.pnghttp://www.gravesconcrete.com/allaboutretainingwalls.htm
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Precast*http://www.humes.com.au/ProdsServices/PrecastConcrete/PC_StorageWalls.shtml
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Standard Design Sheets-CIP
Cantilever/Gravity Wall Standard
Note: Not to be used for design!!!! Handouts are old, rescinded standard sheets given solely for the educational purpose of looking at details and deriving bar lists.
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Some assumptions used for std. design
Unit wt of earth 120 pcfUnit wt of concrete 150 pcfActive earth pressure of soil behind wall 30 psf (level surcharge)A one-ft depth of surcharge was applied above the toe of the footing.Earth fill behind the wall was assumed w/ the top of finished grade 0.75 feet below wall coping
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All retaining walls are structures -----possible failure modesOverturningSlidingEccentricity (footing can lift)Bearing pressure (footing can burrow into the soil)Rotational stabilitySettling
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Retaining Wall Failureshttp://www.youtube.com/watch?v=EXjVXaqWDLo *
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ExampleGiven:Stem 8Min. Allowable soil pressure=1 Ton/sq ftDesign friction coefficient= 0.5Wall is 40 long*
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ExampleFrom Design Std:Footing width: 5-2Toe Projection: 1-8T Bars #5@18H Bars #5@18D Bars #5@18B Bars #5@18Concrete Unit Quantity: 0.88 cy/lf*
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Drawing/Bar MarksBar marks different than shown on standard drawingsE indicates epoxy coated bars*
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